src/tim/prune/gui/StatusBar.java

   1 package tim.prune.gui;
   2
   3 import java.awt.FlowLayout;
   4
   5 import javax.swing.BorderFactory;
   6 import javax.swing.JLabel;
   7 import javax.swing.JPanel;
   8 import tim.prune.DataSubscriber;
   9
  10 /**
  11  * Class to act as a status bar for the application
  12  */
  13 public class StatusBar extends JPanel implements Runnable, DataSubscriber
  14 {
  15         /** Label for displaying the text */
  16         private JLabel _label = null;
  17         /** timer for clearing the status */
  18         private long _timer = 0L;
  19         /** thread for clearing the status */
  20         private Thread _thread = null;
  21
  22         /** Number of milliseconds until status text cleared */
  23         private static final long DEFAULT_CLEAR_INTERVAL = 1000L * 4;
  24
  25
  26         /**
  27          * Constructor
  28          */
  29         public StatusBar()
  30         {
  31                 setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
  32                 setBorder(BorderFactory.createLoweredBevelBorder());
  33                 _label = new JLabel(" ");
  34                 _label.setFont(_label.getFont().deriveFont(8));
  35                 add(_label);
  36         }
  37
  38         /**
  39          * Run method, to check if text should be deleted
  40          * @see java.lang.Runnable#run()
  41          */
  42         public void run()
  43         {
  44                 while (System.currentTimeMillis() < _timer) {
  45                         try {
  46                                 Thread.sleep(500);
  47                         }
  48                         catch (InterruptedException ie) {} // ignore
  49                 }
  50                 _label.setText(" ");
  51         }
  52
  53         /**
  54          * Accept notification that an action has been completed
  55          * @param inMessage message to display
  56          */
  57         public void actionCompleted(String inMessage)
  58         {
  59                 _label.setText(" " + inMessage);
  60                 _timer = System.currentTimeMillis() + DEFAULT_CLEAR_INTERVAL;
  61                 // If necessary, start a new checker thread
  62                 if (_thread == null || !_thread.isAlive())
  63                 {
  64                         _thread = new Thread(this);
  65                         _thread.start();
  66                 }
  67         }
  68
  69         /**
  70          * Ignore signals about updated data
  71          * @param inUpdateType update type
  72          */
  73         public void dataUpdated(byte inUpdateType)
  74         {
  75         }
  76 }